Atlanta Journal-Constitution:

The mother of the 22-month-old who died after being left inside an SUV told Cobb County police she also researched children dying in hot vehicles, according to new court documents released Sunday morning. “Leanna Harris, the child’s mother, was also questioned regarding the incident and made similar statements regarding researching in car deaths and how it occurs,” search warrant affidavits obtained by The Atlanta Journal-Constitution state. The timing of those online searches and investigators’ findings have not been released. But within about five hours of the toddler’s death on June 18, his father, Justin Ross Harris, was arrested and charged with murder and cruelty to children.... The boy’s father told police he had searched online for information regarding temperatures needed for children to die inside vehicles because he was “fearful” it could happen, according to search warrant affidavits released Saturday.

So... both mom and dad did a little online research about kids dying after being left in hot cars and then their kid dies after being left in a hot car. But at least that kid had a mom and a dad, right Liberty Counsel?